Praher 6" EPDM PVC Butterfly Flange Style Wafer Check Valve is a valve used in hydraulics, pneumatics, pumps, and plumbing systems. It has a spring loaded swing check valve type and a 6-inch diameter. The body material is made of PVC, and the valve has a wafer style flange. The valve is designed to prevent backflow and ensure the flow of fluids in one direction. The EPDM material used in the valve provides excellent resistance to chemicals and temperature changes.